One possible approach to make this search more systematic is the use of factorial design, which involves a set of experiments intended to identify important effects and interactions.
‘A factorial is the product of consecutive numbers from 1 to that particular digit and is represented by placing a‘!’
The experiment was a completely randomized design, with eight treatment combinations, forming a 4 x 2 factorial (four clones and two watering regimes) with five plants in individual pots per treatment combination as replication.
A 2 x 4 x 12 factorial design was used to assess the effects of light, temperature and month, respectively, on the germination of Spergularia marina seeds.
They learned of each other's discoveries because each of them communicated his work to James Stirling, whose approximation for the factorial is a special case of the Euler-Maclaurin summation.
Our trial was of factorial design in order to compare three types of treatment within a single trial, in order to derive the maximum amount of data from the minimum number of patients.
Around 1926, a British statistician, Ronald Fisher, while working in the field of agriculture, developed a new form of experimentation called two-level factorial design.
Experimental designs involving factorial combination of multiple independent variables call for some inventiveness when it comes to graphical presentation of data.
The BES is a factorially derived measure of male and female body esteem.
These two two-level treatments were combined factorially , leading to the following four combinations.